| 摘要 |
A conjugated diene polymer rubber is provided that includes component (A) and component (B) below, component (A) having a content, with the total amount of component (A) and component (B) as 100% by weight, of from 5% to 90% by weight, and component (B) having a content of from 95% to 10% by weight,
Component (A): a conjugated diene polymer rubber component modified with a carbonyl group- and substituted amino group-containing compoundComponent (B): a conjugated diene polymer rubber component modified with a compound represented by formula (IIa) below;(R21O)mSi(R22A)nR234-m-n (IIa);wherein m denotes a number from 1 to 3, n denotes a number from 1 to 3, m+n is from 2 to 4, R21 and R23 denote a hydrocarbyl group, R22 denotes a hydrocarbylene group, A denotes a substituted amino group or an optionally substituted hydrocarbyloxy group, when there are a plurality of R21s the plurality of R21s may be identical to or different from each other, when there are a plurality of R22s the plurality of R22s may be identical to or different from each other, when there are a plurality of R23s the plurality of R23s may be identical to or different from each other, and when there are a plurality of As the plurality of As may be identical to or different from each other. |
